多项选择题
A. Area ID
B. N-selector
C. System ID
D. AS number
E. ISO number
F. MAC address
单项选择题 Three IS-IS routers on a broadcast segment have different priority values configured. Which router is elected the DIS on that broadcast segment?（）
单项选择题 What type of OSPF router is responsible for redistributing routes into OSPF?（）
单项选择题 Which CLI command is used to see the current OSPF link-state database?（）